Hi, I have had my 1996 Chris Craft with a 5.0 OMC Cobra fuel injected engine for about a year now and the boat runs great and always has. The last few times i've taken it out, the boat starts right up and runs perfect but after running the boat for 30 minutes to a few hours I cut it off and dock it. When I go back out to start it, it cranks for about 5-15 seconds before it fires up. Once it starts up it runs fine. Just curious what this can or cant be and if it something that is starting to go bad. Thank you in advance.